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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Plotting with fill_between and timedelta on yaxis throws TypeError","articleBody":"### Bug report\r\nHi everyone,\r\nI don't know whether it is a bug or a missing feature in numpy or matplotlib, but plotting with` fill_between` and a simple `datetime.timedelta` (x axis) throws the following exception:\r\n\r\n`TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''`\r\n\r\nHere is a simple (runnable) example:\r\n\r\n```python\r\nfrom datetime import timedelta\r\nfrom matplotlib import pyplot\r\nfrom pandas import DataFrame\r\n\r\nif __name__ == '__main__':\r\n    df = DataFrame([[timedelta(seconds=0), 4], [timedelta(seconds=10), 5]], columns=['TIME', 'VALUE'])\r\n    df = df.set_index('TIME')\r\n    pyplot.fill_between(df.index, 0, df.VALUE)\r\n```\r\nFull stacktrace:\r\n```\r\nTraceback (most recent call last):\r\n  File \"/de/test.py\", line 11, in \u003cmodule\u003e\r\n    pyplot.fill_between(df.TIME, 0, df.VALUE)\r\n  File \"/usr/lib/python3.6/site-packages/matplotlib/pyplot.py\", line 2896, in fill_between\r\n    **kwargs)\r\n  File \"/usr/lib/python3.6/site-packages/matplotlib/__init__.py\", line 1819, in inner\r\n    return func(ax, *args, **kwargs)\r\n  File \"/usr/lib/python3.6/site-packages/matplotlib/axes/_axes.py\", line 4581, in fill_between\r\n    x = ma.masked_invalid(self.convert_xunits(x))\r\n  File \"/usr/lib/python3.6/site-packages/numpy/ma/core.py\", line 2340, in masked_invalid\r\n    condition = ~(np.isfinite(a))\r\nTypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''\r\n```\r\nWith dates, everthing works as expected:\r\n\r\n```python\r\nfrom matplotlib import pyplot\r\nfrom pandas import DataFrame\r\nimport pandas\r\n\r\n\r\nif __name__ == '__main__':\r\n    df = DataFrame([[1488364614802, 4], [1488364615802, 5]], columns=['TIME', 'VALUE'])\r\n    df.TIME = pandas.to_datetime(df.TIME, unit='ms')\r\n    df = df.set_index('TIME')\r\n    print(df)\r\n    pyplot.fill_between(df.index, 0, df.VALUE)\r\n```\r\n\r\n**Matplotlib version**\r\nMatplotlub version: Version: 2.0.0 (via pip)\r\nPython 3.6.0\r\nPlattform: Linux 4.10.1-1 x86_64\r\n\r\n\r\n","author":{"url":"https://github.com/SebastianRzk","@type":"Person","name":"SebastianRzk"},"datePublished":"2017-03-20T19:54:45.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/8352/matplotlib/issues/8352"}